Malicious PDF — malware analysis report

Static analysis result for SHA-256 e395994da97e9898…

MALICIOUS

PDF

79.8 KB Created: 2021-09-13 11:58:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c6b32ee791732da1bf5c5d2acf32ff2c SHA-1: fcc97d67c6c749661574bc662cef1db5413d7e4a SHA-256: e395994da97e9898ea63d74b639c71d96725a8d6305b65d77e4828ec3bc0469c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to potentially compromised or disposable hosting, indicating a link farm designed to redirect users. ClamAV and ML classifiers strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, suggesting the document is part of a campaign to distribute malicious content or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://movingalpsfoundation.ch/userfiles/file/43174685536.pdf In PDF document text
    • https://pachetedeturism.ro/images/files/labafaxalej.pdfIn PDF document text
    • https://geya99.com/ckfinder/userfiles/files/sagidabuzu.pdfIn PDF document text
    • https://manenshop.com/upload/files/lalijikifigupegarus.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/53675468296.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9a943d2c4---67885216453.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/26830058854.pdfIn PDF document text
    • https://cityface.cz/res/file/73037196144.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/wemizad.pdfIn PDF document text
    • https://processwork.archerhuang.com/ConImg/files/xefujosetumewud.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/wizosi.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/paxijuw.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/xivelafevedutero.pdfIn PDF document text
    • https://navoloki.mebel18.com/uploads/files/lubokosema.pdfIn PDF document text
    • http://hdg-gmuend.de/userfiles/files/zatavatevareriboj.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161375f42f36bc---tagub.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5c794f367---91318539953.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/33120642955.pdfIn PDF document text
    • http://studiogeologicotrilobite.com/userfiles/files/43574266210.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/65455326788.pdfIn PDF document text
    • http://tiga.co.th/ckfinder/userfiles/files/68840632251.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/92532683336.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/vazovomelejesula.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/13013120044.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/74455075218.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/99203791271.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=aimbot+fortnite+pc+2020PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA51 10628 bytes
SHA-256: 7bafbc4344e5265ee1613df635d99e8333ce9dca5c2adcf4b950ebcf698375d4
font_02_sfnt_off0001026b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026B 18080 bytes
SHA-256: d62db390f552def6e44b4a017a457a1be644935f8e1a0345a71810da88d91fa3